package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 *
 * @author
 */
@RestController
@Slf4j
@RequestMapping("dish")
public class DishController {


    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {


        log.info(dishDto.toString());
        //    dishService.save(dishDto);
        dishService.saveWithFlavor(dishDto);

        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null, Dish::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo, queryWrapper);

        //对象拷贝  错误的还不能执行

    /*    BeanUtils.copyProperties(pageInfo,dishDtoPage);

      List<DishDto> dishDtoPageRecords = dishDtoPage.getRecords();
        for (DishDto dishDtoPageRecord : dishDtoPageRecords) {
            Long categoryId = dishDtoPageRecord.getCategoryId();
            Category category = categoryService.getById(categoryId);
            if(null!=category){
                String categoryName = category.getName();
                dishDtoPageRecord.setCategoryName(categoryName);
            }
        }
        dishDtoPage.setRecords(dishDtoPageRecords);*/

        //对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item) -> {

            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应口味信息
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable long id) {

        DishDto byIdWithFlavor = dishService.getByIdWithFlavor(id);
        return R.success(byIdWithFlavor);
    }

    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {

        dishService.updateWithFlavor(dishDto);

        //清理所有菜品的缓存数据
     //   Set keys = redisTemplate.keys("dish_*");
      //  redisTemplate.delete(keys);

        //精确清理某个分类下面的缓存数据
           String key="dish_"+dishDto.getCategoryId()+"_"+dishDto.getStatus();
           redisTemplate.delete(key);


        return R.success("修改成功");
    }

    //停售起售菜品
    @PostMapping("/status/{status}")
    public R<String> sale(@PathVariable int status,
                          String[] ids) {
        for (String id : ids) {
            Dish dish = dishService.getById(id);
            dish.setStatus(status);
            dishService.updateById(dish);
        }
        return R.success("修改成功");
    }

    //删除菜品
    @DeleteMapping
    public R<String> delete(String[] ids) {
        for (String id : ids) {
            Dish dish = dishService.getById(id);
            if (dish.getStatus() == 1) {
                throw new CustomException("正在启售无法删除");

            }
            dishService.removeById(id);


        }
        return R.success("删除成功");
    }

    /**
     * 查询对应的菜品数据
     *
     * @param dish
     * @return
     */
  /*  @GetMapping("/list")
    public R<List<Dish>> list(Dish dish){

        //构造查询条件
        LambdaQueryWrapper<Dish>queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper
                .eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        //添加状态
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);
        return R.success(list);
    }*/
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();
        List<DishDto> dishDtoList = null;
        //先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        //如果存在直接返回无需查询

        if (dishDtoList != null) {
            return R.success(dishDtoList);
        }

        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到redis
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper
                .eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //添加状态
        queryWrapper.eq(Dish::getStatus, 1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);


        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> dishFlavorLambdaQueryWrapper = new LambdaQueryWrapper<>();
            dishFlavorLambdaQueryWrapper.eq(DishFlavor::getDishId, dishId);
            List<DishFlavor> dishFlavorList = dishFlavorService.list(dishFlavorLambdaQueryWrapper);

            dishDto.setFlavors(dishFlavorList);


            return dishDto;
        }).collect(Collectors.toList());


        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES );

        return R.success(dishDtoList);
    }


}

